A Concept of Bio-Inspired Composite Laminate Architecture with Enhanced Ductility and Out-Of-Plane Stiffness

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A. Anbuchezian

Abstract

Carbon fibre reinforced polymer composite laminates have two major challenges: low collapse strain and catastrophic collapse. Researchers introduced defects in the laminate structure, similar to core shells, to induce additional energy disposal processes that promote flexural reactivity. During the laminating method, embedded flaws and delaminations are implanted in bio-inspired laminates at various thickness points. The suggested bio-inspired laminates' flexural characteristics were assessed using a three-point bending test. Microcomputed tomography was used to identify several damage processes and associated phases in regular and bio-inspired laminates. The flexural characteristics of bio-inspired composites can be adjusted by modifying the through-the-thickness delamination size and position, according to experimental results.Furthermore, these bio-inspired materials demonstrated a gradual deterioration pattern with pseudo-ductility reactivity, with low strength loss accompanied with mounting strain and the ability to maintain the same power up to a failure strain 2 times greater than the initial strain. As a result, the bio-inspired laminates suggested demonstrated a metal-like failure as a danger sign before the end collapse, making them suitable for a wide range of technical applications. The size of the delamination has an impact on improvement rates, with smaller delaminations having better characteristics than bigger delaminations. This laminate also has a warning indicator before it fails completely, making bio-inspired laminates a feasible material.Finally, the findings of this study open a new door for composite lamination architects to produce laminates that allow delamination near the indenter interface while limiting delamination elsewhere, increasing strength development and strain after the impact.

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